A package addressed to Chicago Cubs owner Tom Ricketts that was delivered to Wrigley Field contained a goat's head.
No note was included and the Chicago police have taken on the case.
It seems to be a reference to a "curse" placed on the team during the 1945 World Series. Restaurant owner Billy Sianis brought his goat to a game, but was asked to leave and he vowed the team would never win again.
The Cubs lost that series and have never been back. They last won a championship in 1908.